Posted by **Lindsay** on Tuesday, October 9, 2007 at 1:07pm.

It takes 2.5 s for a small ball released from rest from a tall building to reach the ground. The mass of the ball is 0.05 kg. Calculate the height from which the ball is released.

Ok so I have the time, initial velocity, and the acceleration. But the mass totally throws me off...what would the formula for this problem be?

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